Mini Shell

#!/usr/local/cpanel/3rdparty/bin/perl

# cpanel - scripts/gemwrapper                      Copyright 2022 cPanel, L.L.C.
#                                                           All rights reserved.
# copyright@cpanel.net                                         http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited

use strict;
use Cpanel::FileUtils::Path ();

my $hasperlexpect = 0;

eval {
    require IO::Tty;
    require Expect;
    $hasperlexpect = 1;
};

my $gem = Cpanel::FileUtils::Path::findinpath('gem');

if ( $> != 0 ) {
    my $homedir = ( getpwuid($>) )[7];
    $ENV{'HOME'}     = $homedir;                   # restore HOME (cleansed by saferun_r_cleanenv when called from Cpanel::LangMods)
    $ENV{'GEM_HOME'} = $homedir . '/ruby/gems/';
}

if ( $ARGV[0] =~ m/noexpect/ ) {
    shift @ARGV;
    $hasperlexpect = 0;
}

if ( !$hasperlexpect ) {
    exec $gem, @ARGV;
}

$SIG{'ALRM'} = sub { die "Timeout\n"; };
alarm( 20 * 60 );

my $exp = Expect->spawn( $gem, @ARGV ) or die "Cannot spawn gem installer: $!";
my $pid = $exp->pid();

my $number = 0;
while ( waitpid( $pid, 1 ) != -1 ) {
    $exp->expect(
        300,
        [
            qr/(.*\(ruby\).*)/,
            sub {
                if ( !$number ) {
                    ($number) = $exp->match =~ /\s*(\d+)/;
                }
            }
        ],
        [
            '>',
            sub {
                my $temp_number = 1;
                if ($number) {
                    $temp_number = $number;
                    $number      = 0;
                }
                $exp->send( $temp_number . "\r" );
            }
        ],
        [ 'eof',     sub { exit; } ],
        [ 'timeout', sub { $exp->send("\r"); } ],
    );
}

$exp->soft_close();